isdemo.java

来自「java2参考大全上的例子的源码和自己的理解.」· Java 代码 · 共 36 行

package 字符;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

class IsDemo {
  public static void main(String args[]) {
    char a[] = {
        'a', 'b', '5', '?', 'A', ' '};

    for (int i = 0; i < a.length; i++) {
      if (Character.isDigit(a[i])) {
        System.out.println(a[i] + " is a digit.");
      }
      if (Character.isLetter(a[i])) {
    e    System.out.println(a[i] + " is a letter.");
      }
      if (Character.isWhitespace(a[i])) {
        System.out.println(a[i] + " is whitespace.");
      }
      if (Character.isUpperCase(a[i])) {
        System.out.println(a[i] + " is uppercase.");
      }
      if (Character.isLowerCase(a[i])) {
        System.out.println(a[i] + " is lowercase.");
      }
    }
  }
}